"Lets make a tower defense game."
"But haven't TDGs been dun to death?"
"I know lets make one where your towers are useless and may even be a hindrance!"
"What a great idea, that will make it stand out!"
Game is fun for the first few missions. After that it just starts using unfair tricks instead of trying to keep things difficult though any sort of well designed progression.
This is a great game with a lot of good ideas, and I want to love it, but it needs check points. Having to restart the maze every time I made one mistake was so frustrating I stopped playing.